code: def get_available_dates(data_dir):
      """Returns list of available dates in DATA_PATH directory"""
      available_dates = []
  
      for sub_dir in os.listdir(data_dir):
          if os.path.isdir(os.path.join(data_dir, sub_dir)):
              available_dates.append(sub_dir)
  
      return available_dates
  
file_path: CrypTen/benchmarks/dash_app/load_data.py
imports: import os
  import pandas
label_desc: Use image node_id 4 for calling a global function with example usage: get_available_dates(data_dir) and returns: available_dates